Method for enabling a terminal to access a base station, and station, terminal and communication system

ABSTRACT

The present disclosure relates to a method for enabling a terminal to access a base station. The method includes: broadcasting, by a first BS not supporting a shared carrier, a first priority list, wherein the first priority list comprises information indicating that a priority of a BS that does not support the shared carrier is higher than that of a BS that supports the shared carrier; receiving, by the first BS, a first access request from a terminal, receiving, by the first BS, capability information from the terminal in a process of establishing a connection with the terminal; and completing, by the first BS, the connection with the terminal to enable the terminal to access a non-shared network, in a case where the terminal does not support the frequency band of the sharing operator in the shared carrier.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present disclosure is based on and claims priority of Chineseapplication for invention No. 202010809291.4, filed on Aug. 12, 2020,the disclosure of which is hereby incorporated into this disclosure byreference in its entirety The present disclosure is a U.S. NationalStage Application under 35 U.S.C. § 371 of International PatentApplication No. PCT/CN2021/092988, filed on May 11, 2021, which is basedon and claims priority of Chinese application for invention No.202010809291.4 filed on Aug. 12, 2020, the disclosures of both of whichare hereby incorporated into this disclosure by reference in itsentirety.

TECHNICAL FIELD

The present disclosure relates to the field of communicationtechnologies, and in particular, to a method for enabling a terminal toaccess a base station, a base station, a terminal and a communicationsystem.

BACKGROUND

The 5G technology requires higher operating frequency bands and a lot ofbase stations, which are expensive and have high power consumption(about 3 times of 4G). In order to build 5G base stations with low costand high efficiency, it is necessary for operators to build and share 5Gbase stations.

There two schemes for operators constructing and sharing an accessnetwork are that a shared base station use independent carriers orshared carriers. A shared carrier is a carrier with a large continuousbandwidth formed by carrier bands owned by different operators.

A new terminal (such as a 5G terminal) can access a frequency band ofits operator in a shared carrier, or a frequency band of another sharingoperator (other than its operator) in the shared carrier. An oldterminal (such as a 4G terminal) can only access the frequency band ofits operator in a shared carrier. That is, both new and old terminalscan access the shared carrier.

SUMMARY

According to some embodiments of the present disclosure, there isprovided a method for enabling a terminal to access a base station,comprising: broadcasting, by a first Base Station (BS) not supporting ashared carrier, a first priority list, wherein the first priority listcomprises information indicating that a priority of a BS that does notsupport the shared carrier is higher than that of a BS that supports theshared carrier; receiving, by the first BS, a first access request froma terminal, wherein the first access request indicates that the terminalselects to access the first BS according to the first priority list;receiving, by the first BS, capability information from the terminal ina process of establishing a connection with the terminal, wherein thecapability information comprises information about whether the terminalsupports a frequency band of a sharing operator in the shared carrier;and completing, by the first BS, the connection with the terminal toenable the terminal to access a non-shared network, in a case where theterminal does not support the frequency band of the sharing operator inthe shared carrier.

In some embodiments, the method further comprises: sending, by the firstBS, a second priority list to the terminal, in a case where the terminalsupports the frequency band of the sharing operator in the sharedcarrier, wherein the second priority list comprises informationindicating that a priority of a BS that does not support the sharedcarrier is lower than that of a BS that supports the shared carrier, fortriggering the terminal to reselect and access a BS that supports theshared carrier.

In some embodiments, the method further comprises: receiving, by asecond BS supporting the shared carrier, a second access request fromthe terminal, wherein the second access request indicates that theterminal reselects to access the second BS according to the secondpriority list; receiving, by the second BS, the capability informationfrom the terminal in a process of establishing a connection with theterminal; and completing, by the second BS, the connection with theterminal to enable the terminal to access the shared network, in a casewhere the terminal supports the frequency band of the sharing operatorin the shared carrier.

In some embodiments, the method further comprises: broadcasting, by asecond BS supporting the shared carrier, a third priority list, whereinthe third priority list comprises information indicating that a priorityof a BS that does not support the shared carrier is lower than that of aBS that supports the shared carrier; receiving, by the second BS, athird access request from the terminal, wherein the third access requestindicates that the terminal selects to access the second BS according tothe third priority list; receiving, by the second BS, the capabilityinformation from the terminal in a process of establishing a connectionwith the terminal; and completing, by the second BS, the connection withthe terminal to enable the terminal to access the shared network, in acase where the terminal supports the frequency band of the sharingoperator in the shared carrier.

In some embodiments, the method further comprises: sending, by thesecond BS, a fourth priority list to the terminal to trigger theterminal to reselect and access a BS that does not support the sharedcarrier, in a case where the terminal does not support the frequencyband of the sharing operator in the shared carrier, wherein the fourthpriority list comprises information indicating that the priority of a BSthat does not support the shared carrier is higher than that of a BSthat supports the shared carrier.

In some embodiments, the method further comprises: receiving, by thefirst BS, a fourth access request from the terminal, wherein the fourthaccess request indicates that the terminal reselects to access the firstBS according to the fourth priority list; receiving, by the first BS,the capability information from the terminal in a process ofestablishing a connection with the terminal; and completing, by thefirst BS, the connection with the terminal to enable the terminal toaccess a non-shared network, in a case where the terminal does notsupport the frequency band of the sharing operator in the sharedcarrier.

In some embodiments, the second BS receives the capability informationsent from the terminal through a UE Capability Information message, andthe second BS sends the fourth priority list to the terminal through aRadio Resource Control (RRC) Reconfiguration message.

In some embodiments, the first BS receives the capability informationsent from the terminal through a UE Capability Information message, andthe first BS sends the second priority list to the terminal through aRadio Resource Control (RRC) Reconfiguration message.

According to other embodiments of the present disclosure, there isprovided a method for enabling a terminal to access a base station,performed by a terminal, comprising: receiving a first priority listbroadcast by a first Base Station (BS) not supporting a shared carrier,and the first priority list comprises information indicating that apriority of a BS that does not support the shared carrier is higher thanthat of a BS that supports the shared carrier; selecting the first BSaccording to the first priority list and sending a first access requestto the first BS; sending capability information to the first BS in aprocess of establishing a connection with the first BS, wherein thecapability information comprises information about whether the terminalsupports a frequency band of a sharing operator in the shared carrier;and completing the connection with the first BS to access a non-sharednetwork, in a case where the terminal does not support the frequencyband of the sharing operator in the shared carrier.

In some embodiments, the method further comprises: receiving a secondpriority list from the first BS, in a case where the terminal supportsthe frequency band of the sharing operator in the shared carrier,wherein the second priority list comprises information indicating that apriority of a BS that does not support the shared carrier is lower thanthat of a BS that supports the shared carrier; measuring signals ofsurrounding BSs supporting the shared carrier to obtain a firstmeasurement result according to the second priority list; selecting asecond BS supporting a shared carrier according to the first measurementresult and sending a second access request to the second BS; sending thecapability information to the second BS in a process of establishing aconnection with the second BS; and completing the connection with thesecond BS to access the shared network, in a case where the terminalsupports the frequency band of the sharing operator in the sharedcarrier.

In some embodiments, the method further comprises: receiving a thirdpriority list broadcast by a second BS supporting a shared carrier,wherein the third priority list comprises information indicating that apriority of a BS that does not support the shared carrier is lower thanthat of a BS that supports the shared carrier; selecting the second BSaccording to the third priority list and sending a third access requestto the second BS; sending the capability information to the second BS ina process of establishing a connection with the second BS; andcompleting the connection with the second BS to access the sharednetwork, in a case where the terminal supports the frequency band of thesharing operator in the shared carrier.

In some embodiments, the method further comprises: receiving a fourthpriority list sent by the second BS, in a case where the terminal doesnot support the frequency band of the sharing operator in the sharedcarrier, wherein the fourth priority list comprises informationindicating that a priority of a BS that does not support the sharedcarrier is higher than that of a BS that supports the shared carrier;measuring signals of surrounding BSs not supporting the shared carrierto obtain a second measurement result according to the fourth prioritylist; selecting the first BS according to the second measurement resultand sending a fourth access request to the first BS; sending thecapability information to the first BS in a process of establishing aconnection with the first BS; and completing the connection with thefirst BS to access a non-shared network, in a case where the terminaldoes not support the frequency band of the sharing operator in theshared carrier.

In some embodiments, in a case where the terminal receives the firstpriority list broadcast by the first BS and the third priority listbroadcast by the second BS, the terminal selects the first priority listor the third priority list according to the capability information,wherein the terminal selects the first priority list in a case where theterminal does not support the frequency band of the sharing operator inthe shared carrier, and selects the third priority list in a case wherethe terminal supports the frequency band of the sharing operator in theshared carrier.

According to still other embodiments of the present disclosure, there isprovided a BS, comprising: a broadcasting module configured to broadcasta first priority list, wherein the first BS is a BS that does notsupport a shared carrier, and the first priority list comprisesinformation indicating that a priority of a BS that does not support ashared carrier is higher than that of a BS that supports a sharedcarrier; a receiving module configured to receive a first access requestfrom a terminal, wherein the first access request indicates that theterminal selects to access the first BS according to the first prioritylist and receive capability information sent from the terminal in aprocess of establishing a connection with the terminal, wherein thecapability information comprises information about whether the terminalsupports a frequency band of a sharing operator in a shared carrier; anda connecting module configured to complete the connection with theterminal to enable the terminal to access to a non-shared network, in acase where the terminal does not support the frequency band of thesharing operator in the shared carrier.

In some embodiments, the BS further comprises: a sending moduleconfigured to send a second priority list to the terminal, in a casewhere the terminal supports the frequency band of the sharing operatorin the shared carrier, wherein the second priority list comprisesinformation indicating that a priority of a BS that does not support ashared carrier is lower than that of a BS that supports a sharedcarrier, for triggering the terminal to reselect and access a BS thatsupports a shared carrier.

In some embodiments, the receiving module is further configured toreceive a fourth access request from the terminal, wherein the fourthaccess request indicates that the terminal reselects to access the firstBS according to a fourth priority list sent by a second BS, and thefourth priority list comprises information indicating that the priorityof a BS that does not support a shared carrier is higher than that of aBS that supports a shared carrier.

According to still other embodiments of the present disclosure, there isprovided a terminal, comprising: a receiving module configured toreceive a first priority list broadcast by a first Base Station (BS),wherein the first BS is a BS that does not support a shared carrier, andthe first priority list comprises information indicating that a priorityof a BS that does not support a shared carrier is higher than that of aBS that supports a shared carrier; a sending module configured to selectthe first BS according to the first priority list, send a first accessrequest to the first BS and send capability information to the first BSin a process of establishing a connection with the first BS, wherein thecapability information comprises information about whether the terminalsupports a frequency band of a sharing operator in a shared carrier; anda connecting configured to complete the connection with the first BS toaccess to a non-shared network, in a case where the terminal does notsupport the frequency band of the sharing operator in the sharedcarrier.

In some embodiments, the terminal further comprises: a measurementmodule, wherein: the receiving module is further configured to receive asecond priority list sent from the first BS, in a case where theterminal supports the frequency band of the sharing operator in theshared carrier, wherein the second priority list comprises informationindicating that a priority of a BS that does not support a sharedcarrier is lower than that of a BS that supports a shared carrier; themeasurement module is configured to measure signals of surrounding BSsthat support a shared carrier to obtain a first measurement resultaccording to the second priority list; the sending module is furtherconfigured to select a second BS according to the first measurementresult, send a second access request to the second BS and send thecapability information to the second BS in a process of establishing aconnection with the second BS, wherein the second BS is a BS thatsupports a shared carrier; and the connecting module is furtherconfigured to complete the connection with the second BS to access to ashared network, in a case where the terminal supports the frequency bandof the sharing operator in the shared carrier.

In some embodiments, the receiving module is further configured toreceive a third priority list broadcast by a second BS, wherein thesecond BS is a BS that supports a shared carrier, and the third prioritylist comprises information indicating that a priority of a BS that doesnot support a shared carrier is lower than that of a BS that supports ashared carrier; the sending module is further configured to select thesecond BS according to the third priority list and sending a thirdaccess request to the second BS, send a third access request to thesecond BS and send the capability information to the second BS in aprocess of establishing a connection with the second BS; and theconnecting module is further configured to complete the connection withthe second BS to access to a shared network, in a case where theterminal supports the frequency band of the sharing operator in theshared carrier.

In some embodiments, the terminal further comprises: a measurementmodule, wherein: the receiving module is further configured to receive afourth priority list sent by the second BS, in a case where the terminaldoes not support the frequency band of the sharing operator in theshared carrier, wherein the fourth priority list comprises informationindicating that a priority of a BS that does not support a sharedcarrier is higher than that of a BS that supports a shared carrier; themeasuring module is configured to measure signals of surrounding BSsthat do not support a shared carrier to obtain a second measurementresult according to the fourth priority list; the sending module isconfigured to select the first BS according to the second measurementresult, send a fourth access request to the first BS and send thecapability information to the first BS in a process of establishing aconnection with the first BS; and the connecting module is furtherconfigured to complete the connection with the first BS to access to anon-shared network, in a case where the terminal does not support thefrequency band of the sharing operator in the shared carrier.

In some embodiments, the receiving module is configured to select thefirst priority list or the third priority list according to thecapability information, in a case where the terminal receives the firstpriority list broadcast by the first BS and the third priority listbroadcast by the second BS, wherein the terminal selects the firstpriority list in a case where the terminal does not support thefrequency band of the sharing operator in the shared carrier, and selectthe third priority list in a case where the terminal supports thefrequency band of the sharing operator in the shared carrier.

According to still other embodiments of the present disclosure, there isprovided a communication system, comprising: a first BS according to anyof the foregoing embodiments and a terminal according to any of theforegoing embodiments.

In some embodiments, the communication system further comprises: asecond BS supporting the shared carrier, configured to receive a secondaccess request from the terminal, receive capability information fromthe terminal in a process of establishing a connection with the terminaland complete the connection with the terminal to enable the terminal toaccess to a shared network, in a case where the terminal supports thefrequency band of the sharing operator in the shared carrier, whereinthe second access request indicates that the terminal reselects toaccess the second BS according to the second priority list, and thecapability information comprises information about whether the terminalsupports the frequency band of the sharing operator in the sharedcarrier.

In some embodiments, the second BS is configured to broadcast a thirdpriority list, receive a third access request from the terminal, receivethe capability information from the terminal in a process ofestablishing a connection with the terminal and complete the connectionwith the terminal to enable the terminal to access a shared network, ina case where the terminal supports the frequency band of the sharingoperator in the shared carrier, wherein the third priority listcomprises information indicating that the priority of a BS that does notsupport the shared carrier is lower than that of a BS that supports theshared carrier, and the third access request indicates that the terminalselects to access the second BS according to the third priority list.

In some embodiments, the second BS is further configured to send afourth priority list to the terminal to trigger the terminal to reselectand access a BS that does not support the shared carrier, in a casewhere the terminal does not support the frequency band of the sharingoperator in the shared carrier, wherein the fourth priority listcomprises information indicating that the priority of a BS that does notsupport the shared carrier is higher than that of a BS that supports theshared carrier.

According to further embodiments of the present disclosure, there isprovided an electronic device, comprising: a processor; a memory coupledto the processor for storing instructions, which when executed by theprocessor, cause the processor to execute the method for enabling aterminal to access a base station according to any one of the foregoingembodiments.

According to still other embodiments of the present disclosure, there isprovided a non-transitory computer-readable storage medium on which acomputer program is stored, wherein the program, when executed by aprocessor, implements the steps of the method for enabling a terminal toaccess a base station according to any one of the foregoing embodiments.

Other features and advantages of the present invention will becomeapparent from the following detailed description of exemplaryembodiments of the present disclosure with reference to the accompanyingdrawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are comprised to provide a furtherunderstanding of the present disclosure and are incorporated in andconstitute a part of this specification, illustrate embodiments of theinvention, and together with the illustrative embodiments of the presentapplication serve to explain the present disclosure, but are notlimitation thereof.

FIG. 1 shows the flow diagram of a method for enabling a terminal toaccess a base station according to some embodiments of the presentdisclosure;

FIG. 2 shows the flow diagram of a method for enabling a terminal toaccess a base station according to other embodiments of the presentdisclosure;

FIG. 3 shows the flow diagram of a method for enabling a terminal toaccess a base station according to still other embodiments of thepresent disclosure;

FIG. 4 shows a schematic structural diagram of a BS according to someembodiments of the present disclosure;

FIG. 5 shows a schematic structural diagram of a terminal according tosome embodiments of the present disclosure;

FIG. 6 shows a structural diagram of a communication system according tosome embodiments of the present disclosure;

FIG. 7 shows a structural diagram of an electronic device according tosome embodiments of the present disclosure;

FIG. 8 shows a structural diagram of an electronic device according toother embodiments of the present disclosure.

DETAILED DESCRIPTION

Below, a clear and complete description will be given for the technicalsolution of embodiments of the present disclosure with reference to thefigures of the embodiments. Obviously, merely some embodiments of thepresent disclosure, rather than all embodiments thereof, are givenherein. The following description of at least one exemplary embodimentis in fact merely illustrative and is in no way intended as a limitationto the invention, its application or use. All other embodiments obtainedby those of ordinary skill in the art based on the embodiments of thepresent disclosure without creative efforts shall fall within theprotection scope of the present disclosure.

The inventors have found that in a long period of transition to 5Gnetworks, there are still a large number of Base Stations (BSs) that donot support a shared carrier and old terminals in current networks. Atpresent, a BS that support a shared carrier can be accessed by both newand old terminals, which is easy to cause heavy load on the BS thatsupport a shared carrier, while other BSs that do not support a sharedcarrier are idle, affecting qualities of services of the terminalsaccordingly.

A technical problem to be solved by the present disclosure is how toimprove a load balance of BSs that support a shared carrier and thosethat do not support a shared carrier.

A method for enabling a terminal to access a base station provided inthe present disclosure will be described below with reference to FIGS. 1to 3 .

FIG. 1 is a flowchart of a method for enabling a terminal to access abase station according to some embodiments of the present disclosure. Asshown in FIG. 1 , the method of these embodiments comprises: steps S102to S108.

In step S102, a first BS broadcasts a first priority list, and aterminal receives the first priority list broadcast by the first BScorrespondingly.

The first BS is a BS that does not support a shared carrier, and thefirst priority list comprises information indicating that a priority ofa BS that does not support a shared carrier is higher than that of a BSthat supports a shared carrier. The first priority list may compriseidentifiers of BSs in the whole network and corresponding prioritylevels of the various BSs, or the first priority list may compriseidentifiers of the first BS and its surrounding BSs and correspondingpriority levels of the various BSs. For example, a first priority can beassigned to all BSs that do not support a shared carrier, and a secondpriority can be assigned to BSs that support a shared carrier, whereinthe first priority is higher than the second priority. It is alsopossible to assign different priorities to BSs of a same type accordingto actual needs. For example, different priorities can be assigned tothe BSs that do not support a shared carrier according to their modes.For example, 4G BSs have a higher priority, and 3G or 2G BSs have alower priority. The present disclosure is not limited to the aboveexample, but in general, the priorities of the BSs that do not support ashared carrier are higher than that of the BSs that support a sharedcarrier.

In step S104, the terminal selects the first BS according to the firstpriority list and sends a first access request to the first BS, and thefirst BS receives the first access request correspondingly.

The terminal can measure a signal quality of each BS that does notsupport a shared carrier in priority according to the first prioritylist. For example, if the signal quality of the first BS is the best ormeets a preset condition, the terminal can select the first BS and senda first access request. That is, the first access request representsthat the terminal selects to access the first BS according to the firstpriority list. For details, a reference can be made to a process of aterminal selecting and accessing a resident cell after the terminal isturned on in existing standards. The first access request is, forexample, an RRC (radio resource control) connection request.

In step S106, the terminal sends capability information to the first BSduring a process of establishing a connection with the first BS, and thefirst BS receives the capability information sent by the terminalcorrespondingly during the process of establishing the connection withthe terminal.

For example, the capability information comprises information aboutwhether the terminal supports a frequency band of a sharing operator ina shared carrier. For example, the capability information comprises, afrequency band supported by the terminal. The first BS can determinewhether the frequency band supported by the terminal is comprised in thefrequency band of the sharing operator in the shared carrier.

In some embodiments, the first BS sends a UE Capability Enquiry messageto the terminal, and the terminal sends the capability information tothe first BS through a UE Capability Information message.

In step S108, the first BS completes the connection with the terminal toenable the terminal to access a non-shared network, in a case where theterminal does not support the frequency band of the sharing operator inthe shared carrier.

The first BS verifies the capability information of the terminal. If theterminal does not support the frequency band of the sharing operator inthe shared carrier, the terminal is enabled to access a non-sharednetwork and reside in the first BS.

In the above embodiment, the first BS, as a BS that does not support ashared carrier, can broadcast the first priority list that comprisesinformation indicating that the priority of a BS that does not support ashared carrier is higher than that of a BS that supports a sharedcarrier, to enable the terminal to select to access a BS that does notsupport a shared carrier in priority after receiving the first prioritylist. Further, the first BS receives the capability information reportedby the terminal, verifies the capability information of the terminal. Ifthe terminal does not support the frequency band of the sharing operatorin the shared carrier, the first BS completes the connection with theterminal to enable the terminal to access the non-shared network. In theabove embodiment, through broadcasting the first priority list by a BSthat does not support a shared carrier and reporting capabilityinformation by a terminal, an old terminal that does not support afrequency band of a shared operator in a shared carrier can access a BSthat does not support a shared carrier as much as possible, which canimprove a load balance between BSs that supports a shared carrier andBSs that does not support a shared carrier, reduce idle time of BSs thatdoes not support a shared carrier, and therefore improve an overallservice quality.

A method for a enabling a terminal to access a base station according toother embodiments of the present disclosure will be described below withreference to FIG. 2 .

FIG. 2 is a flowchart of a method for enabling a terminal to access abase station according to other embodiments of the present disclosure.As shown in FIG. 2 , the method of these embodiments comprises: stepsS202 to S210.

In step S202, a first BS sends a second priority list to the terminaland the terminal receives the second priority list sent by the first BScorrespondingly, in a case where the terminal supports the frequencyband of the sharing operator in the shared carrier.

The second priority list is individually sent to the terminal by thefirst BS, and comprises information indicating that a priority of a BSthat does not support a shared carrier is lower than that of a BS thatsupports a shared carrier. The second priority list may compriseidentifiers of all BSs in the whole network and corresponding prioritylevels of the various BSs, or the second priority list may compriseidentifiers of the first BS and its surrounding BSs and correspondingpriority levels of the various BSs. For example, a first priority can beassigned to BSs that support a shared carrier, and a second priority canbe assigned to BSs that do not support a shared carrier, wherein thefirst priority is higher than the second priority. It is also possibleto assign different priorities to BSs of a same type according to actualneeds. However, in general, the priorities of the BSs that do notsupport a shared carrier are lower than that of BSs that support ashared carrier.

In some embodiments, the first BS sends the second priority list to theterminal through a RRC Reconfiguration message. Steps S202 and S208 canbe executed in parallel.

In step S204, the terminal measures signals of surrounding BSs thatsupport a shared carrier to obtain a first measurement result accordingto the second priority list.

After receiving the second priority list, the terminal searches thesignals of the surrounding BSs that support a shared carrier. Forexample, the terminal receives signals from multiple BSs and determinesa type and priority of each BS according to BS identifiers in the secondpriority list.

In step S206, the terminal selects a second BS according to the firstmeasurement result, and sends a second access request to the second BS,and the second BS receives the second access request correspondingly.

The second BS is a BS that supports a shared carrier. The terminal mayreceive signals from multiple BSs that support a shared carrier, and candetermine whether a signal quality of each BS that supports a sharedcarrier meets a first access condition. For example, the first accesscondition comprises a first signal quality threshold. A BS (for example,a second BS) that supports a shared carrier and meets the first accesscondition is selected. The first access condition can be specifiedaccording to actual needs. For example, it can be, but not limited to, asignal quality higher than a signal quality of the first BS.Alternatively, the terminal can select a BS with the best signal qualityfrom the BSs that support a shared carrier as the second BS.

In step S208, the terminal sends capability information to the second BSin a process of establishing a connection with the second BS and thesecond BS receives the capability information sent by the terminalcorrespondingly during the process of establishing the connection withthe terminal.

The capability information comprises information about whether theterminal supports a frequency band of a sharing operator in a sharedcarrier. For example, the capability information comprises a frequencyband supported by the terminal. The second BS can determine whether thefrequency band supported by the terminal is comprised in the frequencyband of the sharing operator in the shared carrier.

In step S210, the second BS completes the connection with the terminalto enable the terminal to access a shared network, in a case where theterminal supports the frequency band of the sharing operator in theshared carrier.

The second BS verifies the capability information of the terminal. Ifthe terminal supports the frequency band of the sharing operator in theshared carrier, the terminal is enabled to access the shared network andreside in the second BS.

In the above embodiment, the terminal supports the frequency band of thesharing operator in the shared carrier. The first BS further sends thesecond priority list to guide the terminal to perform a cellre-selection and access the second BS.

Different terminals can be guided to different networks for residence,which can achieve an accurate user separation, and achieve a loadbalance between the shared network and non-shared network.

A method for enabling a terminal to access a base station according tostill other embodiments of the present disclosure will be describedbelow with reference to FIG. 3 .

FIG. 3 is a flowchart of a method for enabling a terminal to access abase station according to still other embodiments of the presentdisclosure. As shown in FIG. 3 , the method of these embodimentscomprises: steps S302 to S318.

In step S302, a second BS broadcasts a third priority list, and aterminal receives the third priority list broadcast by the second BScorrespondingly.

For example, the third priority list comprises information indicatingthat a priority of a BS that does not support a shared carrier is lowerthan that of a BS that supports a shared carrier. The third prioritylist may comprise identifiers of all BSs in the whole network andcorresponding priority levels of the various BSs, or the third prioritylist may comprise identifiers of the second BS and its surrounding BSsand corresponding priority levels of the various BSs. If both of thethird priority list and the first priority list comprise the identifiersof all BSs in the whole network and the corresponding priority levels ofthe various BSs, the third priority list and the first priority list maybe identical.

In some embodiments, in a case where the terminal receives the firstpriority list broadcast by the first BS and the third priority listbroadcast by the second BS, the terminal selects the first priority listor the third priority list according to the capability information,wherein the terminal selects the first priority list in a case where theterminal does not support the frequency band of the sharing operator inthe shared carrier, and selects the third priority list in a case wherethe terminal supports the frequency band of the sharing operator in theshared carrier.

In step S304, the terminal selects the second BS according to the thirdpriority list and sends a third access request to the second BS, and thesecond BS receives the third access request correspondingly.

According to the third priority list, the terminal can measure a signalquality of each BS that supports a shared carrier in priority. Forexample, if the signal quality of the second BS is the best or meets apreset condition, the terminal can select the second BS and initiate thethird access request. That is, the third access request indicates thatthe terminal selects to access the second BS according to the thirdpriority list. For details, a reference can be made to a process inexisting standards that a terminal selects and accesses a resident cellafter the terminal turns on. The third access request is, for example,an RRC connection request.

In step S306, the terminal sends capability information to the second BSduring the establishment of a connection with the second BS, and thesecond BS receives the capability information sent by the terminalcorrespondingly.

For example, the capability information comprises the capabilityinformation comprises information about whether the terminal supports afrequency band of a sharing operator in a shared carrier. For example,the capability information comprises a frequency band supported by theterminal. The second BS can determine whether the frequency bandsupported by the terminal is comprised in the frequency band of thesharing operator in the shared carrier.

The second BS sends a UE Capability Enquiry message to the terminal, andthe terminal sends capability information to the second BS through a UECapability Information message.

In step S308, the second BS completes the connection with the terminalto enable the terminal to access a shared network, in a case where theterminal supports the frequency band of the sharing operator in theshared carrier.

The second BS verifies the capability information of the terminal. Ifthe terminal supports the frequency band of the sharing operator in theshared carrier, the terminal is enabled to access the shared network andreside in the second BS.

In step S310, the second BS sends a fourth priority list to theterminal, and the terminal receives the fourth priority list sent by thesecond BS correspondingly, in a case where the terminal supports thefrequency band of the sharing operator in the shared carrier.

The fourth priority list is individually sent to the terminal by thefourth BS, and comprises information indicating that a priority of a BSthat does not support a shared carrier is higher than that of a BS thatsupports a shared carrier. For example, the fourth priority list maycomprise identifiers of all BSs in the whole network and correspondingpriority levels of the various BSs, or the fourth priority list maycomprise identifiers of the second BS and its surrounding BSs andcorresponding priority levels of the various BSs. If both of the fourthpriority list and the second priority list comprise the identifiers ofall BSs in the whole network and the corresponding priority levels ofthe various BSs, the fourth priority list and the second priority listmay be identical.

The second BS may send the fourth priority list to the terminal througha RRC Reconfiguration message. Steps S310 and S308 can be executed inparallel.

In step S312, the terminal measures signals of surrounding BSs that donot support a shared carrier to obtain a second measurement resultaccording to the fourth priority list.

After receiving the fourth priority list, the terminal searches signalsof surrounding BSs that do not support shared carrier.

In step S314, the terminal selects a first BS according to the secondmeasurement result, and sends a fourth access request to the first BS,and the first BS receives the fourth access request correspondingly.

The terminal may receive signals from multiple BSs that do not support ashared carrier, and can determine whether a signal quality of each BSthat does not support a shared carrier meets a second access condition.For example, the second access condition comprises a second signalquality threshold. A BS (for example, the first BS) that does notsupport a shared carrier and meets the second access condition isselected. The second access condition can be specified according toactual needs. For example, it can be, but not limited to, a BS having asignal quality higher than the signal quality of the second BS.Alternatively, the terminal can select a BS with the best signal qualityfrom the BSs that does not support a shared carrier as the first BS.

In step S316, the terminal sends the capability information to the firstBS during establishing of a connection with the first BS, and the firstBS receives the capability information sent by the terminalcorrespondingly during the establishing of a connection with theterminal.

The capability information comprises information about whether theterminal supports the frequency band of the sharing operator in theshared carrier. For example, the capability information comprises afrequency band supported by the terminal. The first BS can determinewhether the frequency band supported by the terminal is comprised in thefrequency band of the sharing operator in the shared carrier.

In step S318, the first BS completes the connection with the terminal toenable the terminal to access a non-shared network, in a case where theterminal does not support the frequency band of the sharing operator inthe shared carrier.

The first BS verifies the capability information of the terminal. If theterminal does not support the frequency band of the sharing operator inthe shared carrier, the terminal is enabled to access the non-sharednetwork and reside in the first BS.

In the above embodiment, through broadcasting the third priority list bythe BS that supports a shared carrier and reporting the capacityinformation by the terminal, the new terminal that supports thefrequency band of the sharing operator in the shared carrier can accessthe BS that supports a shared carrier as much as possible, which canimprove a load balance between BSs that supports a shared carrier andBSs that does not support a shared carrier, reduce idle time of BSs thatdoes not support shared carrier, and therefore improve the overallservice quality.

The present disclosure also provides a BS, which will be described belowwith reference to FIG. 4 .

FIG. 4 is a structural diagram of a BS according to some embodiments ofthe present disclosure. As shown in FIG. 4 , a BS 40 configured as afirst BS of this embodiment comprises: a broadcasting module 410, areceiving module 420 and a connecting module 430. The skilled person inthe art can understand that the broadcasting module can be realized by atransmitter in the BS, the receiving module can be realized by areceiver in the BS and the connecting module can be realized by aprocesser in the BS.

The broadcasting module 410 is configured to broadcast a first prioritylist, wherein the first priority list comprises information indicatingthat a priority of a BS that does not support the shared carrier ishigher than that of a BS that supports the shared carrier.

The receiving module 420 is configured to receive a first access requestfrom a terminal, and receive capability information from the terminal ina process of establishing a connection with the terminal, wherein thefirst access request indicates that the terminal selects to access thefirst BS according to the first priority list and the capabilityinformation comprises information about whether the terminal supports afrequency band of a sharing operator in the shared carrier.

The connecting module 430 is configured to complete the connection withthe terminal to enable the terminal to access a non-shared network, in acase where the terminal does not support the frequency band of thesharing operator in the shared carrier.

In some embodiments, the BS 40 further comprises: a sending module 440configured to send a second priority list to the terminal, in a casewhere the terminal supports the frequency band of the sharing operatorin the shared carrier, wherein the second priority list comprisesinformation indicating that a priority of a BS that does not support theshared carrier is lower than that of a BS that supports the sharedcarrier, for triggering the terminal to reselect and access a BS thatsupports the shared carrier.

In some embodiments, the terminal sends the capability information tothe first BS through a UE Capability Information message, and thereceiving module 420 is configured to receive the capability informationsent by the terminal through the UE Capability Information message. Thesending module 440 is configured to send the second priority list to theterminal through a RRC Reconfiguration message.

In some embodiments, the receiving module 420 is further configured toreceive a fourth access request from the terminal, wherein the fourthaccess request indicates that the terminal reselects to access the firstBS according to a fourth priority list sent by a second BS.

The present disclosure also provides a terminal, which will be describedbelow with reference to FIG. 5 .

FIG. 5 is a structural diagram of a terminal according to someembodiments of the present disclosure. As shown in FIG. 5 , the terminal50 of this embodiment comprises: a receiving module 510, a sendingmodule 520, and a connecting module 530.

The receiving module 510 is configured to receive a first priority listbroadcast by a first Base Station (BS) not supporting a shared carrier,wherein the first priority list comprises information indicating that apriority of a BS that does not support the shared carrier is higher thanthat of a BS that supports the shared carrier. The skilled person in theart can understand that the receiving module can be realized by areceiver in the terminal.

The sending module 520 is configured to select the first BS according tothe first priority list, send a first access request to the first BS andsend capability information to the first BS in a process of establishinga connection with the first BS, wherein the capability informationcomprises information about whether the terminal supports a frequencyband of a sharing operator in the shared carrier. The skilled person inthe art can understand that the sending module can be realized by atransmitter which executes the selecting operation and a processer whichexecutes the sending operation in the terminal.

The connecting module 530 is configured to complete the connection withthe first BS to access a non-shared network, in a case where theterminal does not support the frequency band of the sharing operator inthe shared carrier. The skilled person in the art can understand thatthe connecting module can be realized by a processer in the terminal.

In some embodiments, the terminal 50 further comprises: a measurementmodule 540. In some embodiments, the receiving module 510 is furtherconfigured to receive a second priority list from the first BS, in acase where the terminal 50 supports the frequency band of the sharingoperator in the shared carrier, wherein the second priority listcomprises information indicating that a priority of a BS that does notsupport the shared carrier is lower than that of a BS that supports theshared carrier; the measurement module 540 is configured to measuresignals of surrounding BSs supporting the shared carrier to obtain afirst measurement result according to the second priority list; thesending module 520 is further configured to select a second BS accordingto the first measurement result, send a second access request to thesecond BS and send the capability information to the second BS in aprocess of establishing a connection with the second BS, wherein thesecond BS is a BS that supports the shared carrier; and the connectingmodule 530 is further configured to complete the connection with thesecond BS to access a shared network, in a case where the terminalsupports the frequency band of the sharing operator in the sharedcarrier. The skilled person in the art can understand that themeasurement module can be realized by a receiver in the terminal.

In some embodiments, the receiving module 510 is further configured toreceive a third priority list broadcast by a second BS supporting theshared carrier, and wherein the third priority list comprisesinformation indicating that a priority of a BS that does not support theshared carrier is lower than that of a BS that supports the sharedcarrier; the sending module 520 is further configured to select thesecond BS according to the third priority list, send a third accessrequest to the second BS and send the capability information to thesecond BS in a process of establishing a connection with the second BS;the connecting module 530 is further configured to complete theconnection with the second BS to access a shared network, in a casewhere the terminal supports the frequency band of the sharing operatorin the shared carrier.

In some embodiments, the receiving module 510 is further configured toreceive a fourth priority list sent by the second BS, in a case wherethe terminal 50 does not support the frequency band of the sharingoperator in the shared carrier, wherein the fourth priority listcomprises information indicating that a priority of a BS that does notsupport the shared carrier is higher than that of a BS that supports theshared carrier; the measuring module 540 is configured to measuresignals of surrounding BSs not supporting the shared carrier to obtain asecond measurement result according to the fourth priority list; thesending module 520 is configured to select the first BS according to thesecond measurement result, send a fourth access request to the first BSand send the capability information to the first BS in a process ofestablishing a connection with the first BS wherein the capabilityinformation comprises information about whether the terminal supportsthe frequency band of the sharing operator in the shared carrier; theconnecting module 530 is further configured to configured to completethe connection with the first BS to access a non-shared network, in acase where the terminal 50 does not support the frequency band of thesharing operator in the shared carrier.

In some embodiments, the receiving module 510 is configured to selectthe first priority list or the third priority list according to thecapability information, in a case where the terminal receives the firstpriority list broadcast by the first BS and the third priority listbroadcast by the second BS, wherein the terminal selects the firstpriority list in a case where the terminal does not support thefrequency band of the sharing operator in the shared carrier, and selectthe third priority list in a case where the terminal 50 supports thefrequency band of the sharing operator in the shared carrier.

The present disclosure further provides a communication system, whichwill be described below with reference to FIG. 6 .

FIG. 6 is a structural diagram of a communication system according tosome embodiments of the present disclosure. As shown in FIG. 6 , thesystem 6 of this embodiment comprises: a BS 40 serving as a first BSaccording to any of the foregoing embodiments and a terminal 50according to any of the foregoing embodiments. And the communicationsystem further comprise a second BS 62 supporting the shared carrier.

The second BS 62 is configured to receive a second access request sentby the terminal 50, receive the capability information from the terminal50 in a process of establishing a connection with the terminal 50,complete the connection with the terminal to enable the terminal 50 toaccess a shared network, in a case where the terminal 50 supports thefrequency band of the sharing operator in the shared carrier, whereinthe second access request indicates that the terminal 50 reselects toaccess the second BS according to the second priority list, and thecapability information comprises information about whether the terminal50 supports the frequency band of the sharing operator in the sharedcarrier.

In some embodiments, the second BS 62 is further configured to broadcasta third priority list, receive a third access request from the terminal50, receive the capability information from the terminal 50 in a processof establishing a connection with the terminal 50 and complete theconnection with the terminal 50 to enable the terminal 50 to access ashared network, in a case where the terminal 50 supports the frequencyband of the sharing operator in the shared carrier, wherein the thirdpriority list comprises information indicating that the priority of a BSthat does not support the shared carrier is lower than that of a BS thatsupports the shared carrier, and the third access request indicates thatthe terminal selects to access the second BS according to the thirdpriority list.

In some embodiments, the second BS 62 is further configured to send afourth priority list to the terminal 50 to trigger the terminal 50 toreselect and access a BS that does not support the shared carrier, in acase where the terminal 50 does not support the frequency band of thesharing operator in the shared carrier, wherein the fourth priority listcomprises information indicating that the priority of a BS that does notsupport the shared carrier is higher than that of a BS that supports theshared carrier.

The electronic device of this embodiment of the present disclosure maybe implemented by various computing devices or computer systems, whichwill be described below with reference to FIGS. 7 and 8 . The electronicdevice can execute the method executed by the first BS, the second BS orthe terminal described in any one of the above embodiments.

FIG. 7 is a structural diagram of an electronic device according to someembodiments of the present disclosure. As shown in FIG. 7 , theelectronic device 70 of this embodiment comprises: a memory 710 and aprocessor 720 coupled to the memory 710, the processor 720 configuredto, based on instructions stored in the memory 710, carry out the methodfor enabling a terminal to access a base station according to any one ofthe embodiments of the present disclosure.

Wherein, the memory 710 may comprise, for example, system memory, afixed non-volatile storage medium, or the like. The system memorystores, for example, an operating system, applications, a boot loader, adatabase, and other programs.

FIG. 8 is a structural diagram of an electronic device according to someembodiments of the present disclosure. As shown in FIG. 8 , theelectronic device 80 of this embodiment comprises: a memory 810 and aprocessor 820 that are similar to the memory 710 and the processor 720,respectively. It may further comprise an input-output interface 830, anetwork interface 840, a storage interface 850, and the like. Theseinterfaces 830, 840, 850, the memory 810 and the processor 820 may beconnected through a bus 860, for example. Wherein, the input-outputinterface 830 provides a connection interface for input-output devicessuch as a display, a mouse, a keyboard, and a touch screen. The networkinterface 840 provides a connection interface for various networkeddevices, for example, it can be connected to a database server or acloud storage server. The storage interface 850 provides a connectioninterface for external storage devices such as an SD card and a USBflash disk.

The present disclosure further provides a non-transitorycomputer-readable storage medium on which a computer program is stored,wherein the program is executed by a processor to implement the methodfor enabling a terminal to access a base station of any one of theforegoing embodiments. The program can execute the method executed bythe first BS, the second BS or the terminal described in any one of theabove embodiments.

Those skilled in the art should understand that the embodiments of thepresent disclosure may be provided as a method, a system, or a computerprogram product. Therefore, embodiments of the present disclosure cantake the form of an entirely hardware embodiment, an entirely softwareembodiment or an embodiment containing both hardware and softwareelements. Moreover, the present disclosure may take the form of acomputer program product embodied on one or more computer-usablenon-transitory storage media (comprising but not limited to diskstorage, CD-ROM, optical storage device, etc.) having computer-usableprogram code embodied therein.

The present disclosure is described with reference to flowcharts and/orblock diagrams of methods, apparatuses (systems) and computer programproducts according to embodiments of the present disclosure. It shouldbe understood that each process and/or block in the flowcharts and/orblock diagrams, and combinations of the processes and/or blocks in theflowcharts and/or block diagrams may be implemented by computer programinstructions. The computer program instructions may be provided to aprocessor of a general purpose computer, a special purpose computer, anembedded processor, or other programmable data processing device togenerate a machine such that the instructions executed by a processor ofa computer or other programmable data processing device to generatemeans implementing the functions specified in one or more flows of theflowcharts and/or one or more blocks of the block diagrams.

The computer program instructions may also be stored in a computerreadable storage device capable of directing a computer or otherprogrammable data processing apparatus to operate in a specific mannersuch that the instructions stored in the computer readable storagedevice produce an article of manufacture comprising instruction meansimplementing the functions specified in one or more flows of theflowcharts and/or one or more blocks of the block diagrams.

These computer program instructions can also be loaded onto a computeror other programmable device to perform a series of operation steps onthe computer or other programmable device to generate acomputer-implemented process such that the instructions executed on thecomputer or other programmable device provide steps implementing thefunctions specified in one or more flows of the flowcharts and/or one ormore blocks of the block diagrams. The above is merely preferredembodiments of this disclosure, and is not limitation to thisdisclosure. Within spirit and principles of this disclosure, anymodification, replacement, improvement and etc. shall be contained inthe protection scope of this disclosure.

1. A method for enabling a terminal to access a base station,comprising: broadcasting, by a first Base Station (BS) not supporting ashared carrier, a first priority list, wherein the first priority listcomprises information indicating that a priority of a BS that does notsupport the shared carrier is higher than that of a BS that supports theshared carrier; receiving, by the first BS, a first access request froma terminal, wherein the first access request indicates that the terminalselects to access the first BS according to the first priority list;receiving, by the first BS, capability information from the terminal ina process of establishing a connection with the terminal, wherein thecapability information comprises information about whether the terminalsupports a frequency band of a sharing operator in the shared carrier;and completing, by the first BS, the connection with the terminal toenable the terminal to access a non-shared network, in a case where theterminal does not support the frequency band of the sharing operator inthe shared carrier.
 2. The method for enabling a terminal to accessing abase station according to claim 1, further comprising: sending, by thefirst BS, a second priority list to the terminal, in a case where theterminal supports the frequency band of the sharing operator in theshared carrier, wherein the second priority list comprises informationindicating that a priority of a BS that does not support the sharedcarrier is lower than that of a BS that supports the shared carrier, fortriggering the terminal to reselect and access a BS that supports theshared carrier.
 3. The method for enabling a terminal to access a basestation according to claim 2, wherein: the method further comprises:receiving, by a second BS supporting the shared carrier, a second accessrequest from the terminal, wherein the second access request indicatesthat the terminal reselects to access the second BS according to thesecond priority list, receiving, by the second BS, the capabilityinformation from the terminal in a process of establishing a connectionwith the terminal, and completing, by the second BS, the connection withthe terminal to enable the terminal to access the shared network, in acase where the terminal supports the frequency band of the sharingoperator in the shared carrier; and/or the first BS receives thecapability information from the terminal through a UE CapabilityInformation message, and the first BS sends the second priority list tothe terminal through a Radio Resource Control (RRC) Reconfigurationmessage.
 4. The method for enabling a terminal to access a base stationaccording to claim 1, further comprising: broadcasting, by a second BSsupporting the shared carrier, a third priority list, wherein the thirdpriority list comprises information indicating that a priority of a BSthat does not support the shared carrier is lower than that of a BS thatsupports the shared carrier; receiving, by the second BS, a third accessrequest from the terminal, wherein the third access request indicatesthat the terminal selects to access the second BS according to the thirdpriority list; receiving, by the second BS, the capability informationfrom the terminal in a process of establishing a connection with theterminal; and completing, by the second BS, the connection with theterminal to enable the terminal to access the shared network, in a casewhere the terminal supports the frequency band of the sharing operatorin the shared carrier.
 5. The method for enabling a terminal to access abase station according to claim 4, further comprising: sending, by thesecond BS, a fourth priority list to the terminal to trigger theterminal to reselect and access a BS that does not support the sharedcarrier, in a case where the terminal does not support the frequencyband of the sharing operator in the shared carrier, wherein the fourthpriority list comprises information indicating that the priority of a BSthat does not support the shared carrier is higher than that of a BSthat supports the shared carrier.
 6. The method for enabling a terminalto accessing a base station according to claim 5, wherein: the methodfurther comprises: receiving, by the first BS, a fourth access requestfrom the terminal, wherein the fourth access request indicates that theterminal reselects to access the first BS according to the fourthpriority list, receiving, by the first BS, the capability informationfrom the terminal in a process of establishing a connection with theterminal, and completing, by the first BS, the connection with theterminal to enable the terminal to access a non-shared network, in acase where the terminal does not support the frequency band of thesharing operator in the shared carrier; and/or the second BS receivesthe capability information from the terminal through a UE CapabilityInformation message, and the second BS sends the fourth priority list tothe terminal through a Radio Resource Control (RRC Reconfigurationmessage.
 7. (canceled)
 8. (canceled)
 9. A method for enabling a terminalto access a base station, performed by a terminal, comprising: receivinga first priority list broadcast by a first Base Station (BS) notsupporting a shared carrier, and the first priority list comprisesinformation indicating that a priority of a BS that does not support theshared carrier is higher than that of a BS that supports the sharedcarrier; selecting the first BS according to the first priority list andsending a first access request to the first BS; sending capabilityinformation to the first BS in a process of establishing a connectionwith the first BS, wherein the capability information comprisesinformation about whether the terminal supports a frequency band of asharing operator in the shared carrier; and completing the connectionwith the first BS to access a non-shared network, in a case where theterminal does not support the frequency band of the sharing operator inthe shared carrier.
 10. The method for enabling a terminal to access abase station according to claim 9, further comprising: receiving asecond priority list from the first BS, in a case where the terminalsupports the frequency band of the sharing operator in the sharedcarrier, wherein the second priority list comprises informationindicating that a priority of a BS that does not support the sharedcarrier is lower than that of a BS that supports the shared carrier;measuring signals of surrounding BSs supporting the shared carrier toobtain a first measurement result according to the second priority list;selecting a second BS supporting a shared carrier according to the firstmeasurement result and sending a second access request to the second BS;sending the capability information to the second BS in a process ofestablishing a connection with the second BS; and completing theconnection with the second BS to access the shared network, in a casewhere the terminal supports the frequency band of the sharing operatorin the shared carrier.
 11. The method for enabling a terminal to accessa base station according to claim 9, further comprising: receiving athird priority list broadcast by a second BS supporting a sharedcarrier, wherein the third priority list comprises informationindicating that a priority of a BS that does not support the sharedcarrier is lower than that of a BS that supports the shared carrier;selecting the second BS according to the third priority list and sendinga third access request to the second BS; sending the capabilityinformation to the second BS in a process of establishing a connectionwith the second BS; and completing the connection with the second BS toaccess the shared network, in a case where the terminal supports thefrequency band of the sharing operator in the shared carrier.
 12. Themethod for enabling a terminal to access a base station according toclaim 11, wherein the method further comprising: receiving a fourthpriority list sent by the second BS, in a case where the terminal doesnot support the frequency band of the sharing operator in the sharedcarrier, wherein the fourth priority list comprises informationindicating that a priority of a BS that does not support the sharedcarrier is higher than that of a BS that supports the shared carrier,measuring signals of surrounding BSs not supporting the shared carrierto obtain a second measurement result according to the fourth prioritylist, selecting the first BS according to the second measurement resultand sending a fourth access request to the first BS, sending thecapability information to the first BS in a process of establishing aconnection with the first BS, and completing the connection with thefirst BS to access a non-shared network, in a case where the terminaldoes not support the frequency band of the sharing operator in theshared carrier; and/or the method further comprises: selecting the firstpriority list or the third priority list according to the capabilityinformation, in a case where the terminal receives the first prioritylist broadcast by the first BS and the third priority list broadcast bythe second BS, wherein the terminal selects the first priority list in acase where the terminal does not support the frequency band of thesharing operator in the shared carrier, and selects the third prioritylist in a case where the terminal supports the frequency band of thesharing operator in the shared carrier.
 13. (canceled)
 14. Abase station(BS), wherein in a case where the BS is configured to serve as a firstBS not supporting a shared carrier, the BS comprises: a broadcastingmodule configured to broadcast a first priority list, wherein the firstpriority list comprises information indicating that a priority of a BSthat does not support the shared carrier is higher than that of a BSthat supports the shared carrier; a receiving module configured toreceive a first access request from a terminal, and receive capabilityinformation from the terminal in a process of establishing a connectionwith the terminal, wherein the first access request indicates that theterminal selects to access the first BS according to the first prioritylist and the capability information comprises information about whetherthe terminal supports a frequency band of a sharing operator in theshared carrier; and a connecting module configured to complete theconnection with the terminal to enable the terminal to access anon-shared network, in a case where the terminal does not support thefrequency band of the sharing operator in the shared carrier.
 15. The BSaccording to claim 14, wherein, the BS further comprises: a sendingmodule configured to send a second priority list to the terminal, in acase where the terminal supports the frequency band of the sharingoperator in the shared carrier, wherein the second priority listcomprises information indicating that a priority of a BS that does notsupport the shared carrier is lower than that of a BS that supports theshared carrier, for triggering the terminal to reselect and access a BSthat supports the shared carrier; and/or the receiving module is furtherconfigured to receive a fourth access request from the terminal, whereinthe fourth access request indicates that the terminal reselects toaccess the first BS according to a fourth priority list sent by a secondBS, and the fourth priority list comprises information indicating thatthe priority of a BS that does not support the shared carrier is higherthan that of a BS that supports the shared carrier.
 16. (canceled)
 17. Aterminal, comprising: a receiving module configured to receive a firstpriority list broadcast by a first Base Station (BS) not supporting ashared carrier, wherein the first priority list comprises informationindicating that a priority of a BS that does not support the sharedcarrier is higher than that of a BS that supports the shared carrier; asending module configured to select the first BS according to the firstpriority list, send a first access request to the first BS and sendcapability information to the first BS in a process of establishing aconnection with the first BS, wherein the capability informationcomprises information about whether the terminal supports a frequencyband of a sharing operator in the shared carrier; and a connectingconfigured to complete the connection with the first BS to access anon-shared network, in a case where the terminal does not support thefrequency band of the sharing operator in the shared carrier.
 18. Theterminal according to claim 17, further comprising: a measurementmodule, wherein: the receiving module is further configured to receive asecond priority list from the first BS, in a case where the terminalsupports the frequency band of the sharing operator in the sharedcarrier, wherein the second priority list comprises informationindicating that a priority of a BS that does not support the sharedcarrier is lower than that of a BS that supports the shared carrier; themeasurement module is configured to measure signals of surrounding BSssupporting the shared carrier to obtain a first measurement resultaccording to the second priority list; the sending module is furtherconfigured to select a second BS according to the first measurementresult, send a second access request to the second BS and send thecapability information to the second BS in a process of establishing aconnection with the second BS, wherein the second BS is a BS thatsupports the shared carrier; and the connecting module is furtherconfigured to complete the connection with the second BS to access ashared network, in a case where the terminal supports the frequency bandof the sharing operator in the shared carrier.
 19. The terminalaccording to claim 17, wherein: the receiving module is furtherconfigured to receive a third priority list broadcast by a second BSsupporting the shared carrier, and wherein the third priority listcomprises information indicating that a priority of a BS that does notsupport the shared carrier is lower than that of a BS that supports theshared carrier; the sending module is further configured to select thesecond BS according to the third priority list, send a third accessrequest to the second BS and send the capability information to thesecond BS in a process of establishing a connection with the second BS;and the connecting module is further configured to complete theconnection with the second BS to access a shared network, in a casewhere the terminal supports the frequency band of the sharing operatorin the shared carrier.
 20. The terminal according to claim 19, furthercomprising: a measurement module, wherein: the receiving module isfurther configured to receive a fourth priority list sent by the secondBS, in a case where the terminal does not support the frequency band ofthe sharing operator in the shared carrier, wherein the fourth prioritylist comprises information indicating that a priority of a BS that doesnot support the shared carrier is higher than that of a BS that supportsthe shared carrier, the measuring module is configured to measuresignals of surrounding BSs not supporting the shared carrier to obtain asecond measurement result according to the fourth priority list, thesending module is configured to select the first BS according to thesecond measurement result, send a fourth access request to the first BSand send the capability information to the first BS in a process ofestablishing a connection with the first BS, and the connecting moduleis further configured to complete the connection with the first BS toaccess a non-shared network, in a case where the terminal does notsupport the frequency band of the sharing operator in the sharedcarrier; and/or the receiving module is configured to select the firstpriority list or the third priority list according to the capabilityinformation, in a case where the terminal receives the first prioritylist broadcast by the first BS and the third priority list broadcast bythe second BS, wherein the terminal selects the first priority list in acase where the terminal does not support the frequency band of thesharing operator in the shared carrier, and select the third prioritylist in a case where the terminal supports the frequency band of thesharing operator in the shared carrier.
 21. (canceled)
 22. Acommunication system, comprising: a first BS according to claim 14, anda terminal wherein the terminal is configured to: receive a firstpriority list broadcast by a first BS not supporting a shared carrier,wherein the first priority list comprises information indicating that apriority of a BS that does not support the shared carrier is higher thanthat of a BS that supports the shared carrier; select the first BSaccording to the first priority list, send a first access request to thefirst BS and send capability information to the first BS in a process ofestablishing a connection with the first BS, wherein the capabilityinformation comprises information about whether the terminal supports afrequency band of a sharing operator in the shared carrier; and completethe connection with the first BS to access a non-shared network, in acase where the terminal does not support the frequency band of thesharing operator in the shared carrier.
 23. The communication systemaccording to claim 22, further comprising: a second BS supporting theshared carrier, wherein: the second BS is configured to receive a secondaccess request sent from the terminal, receive the capabilityinformation from the terminal in a process of establishing a connectionwith the terminal and complete the connection with the terminal toenable the terminal to access a shared network, in a case where theterminal supports the frequency band of the sharing operator in theshared carrier, wherein the second access request indicates that theterminal reselects to access the second BS according to the secondpriority list; the second BS is configured to broadcast a third prioritylist, receive a third access request from the terminal, receive thecapability information from the terminal in a process of establishing aconnection with the terminal and complete the connection with theterminal to enable the terminal to access a shared network, in a casewhere the terminal supports the frequency band of the sharing operatorin the shared carrier, wherein the third priority list comprisesinformation indicating that the priority of a BS that does not supportthe shared carrier is lower than that of a BS that supports the sharedcarrier, and the third access request indicates that the terminalselects to access the second BS according to the third priority list;and/or the second BS is configured to send a fourth priority list to theterminal to trigger the terminal to reselect and access a BS that doesnot support the shared carrier, in a case where the terminal does notsupport the frequency band of the sharing operator in the sharedcarrier, wherein the fourth priority list comprises informationindicating that the priority of a BS that does not support the sharedcarrier is higher than that of a BS that supports the shared carrier.24. (canceled)
 25. An electronic device, comprising: a processor; and amemory coupled to the processor for storing instructions, which whenexecuted by the processor, cause the processor to execute the method forenabling a terminal to access a base station according to claim 1, orcause the processor to: receive a first priority list broadcast by afirst BS not supporting a shared carrier, wherein the first prioritylist comprises information indicating that a priority of a BS that doesnot support the shared carrier is higher than that of a BS that supportsthe shared carrier; select the first 3S according to the first prioritylist, send a first access request to the first BS and send capabilityinformation to the first BS in a process of establishing a connectionwith the first BS, wherein the capability information comprisesinformation about whether the terminal supports a frequency band of asharing operator in the shared carrier; and complete the connection withthe first BS to access a non-shared network, in a case where theterminal does not support the frequency band of the sharing operator inthe shared carrier.
 26. (canceled)